Heartworm is a common parasite of dogs in Grenada, West Indies, due to the tropical climate and large number of mosquitoes. Because Grenada is a developing country and a small island, resources and education on heartworm are limited. In an effort to raise awareness of canine heartworm and the preventive measures available, observations and surveys were performed to determine the following: (a) heartworm knowledge among Grenadian dog caregivers seeking veterinary care at the Grenada Society for the Prevention of Cruelty to Animals (GSPCA), (b) dissemination of heartworm information by GSPCA staff to Grenadian dog caregivers, and (c) reasons Grenadians are not administering heartworm prevention to their dogs. Results indicated a marked deficiency in both heartworm knowledge among Grenadian dog caregivers and heartworm knowledge acquisition and dissemination. Lack of knowledge was also cited as a major reason Grenadian dog caregivers were not using heartworm prevention. These results are currently being utilized to modify heartworm education practices at the GSPCA by incorporating Grenada-specific educational tools, with the ultimate goal of reducing illness and death by canine heartworm.